/**
 * Copyright 2012 ibiblio
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0.txt
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */


package org.ibiblio.terasaur.ui

class DataFormatter {
    static _FILE_SIZE_LABELS = ['PB', 'TB', 'GB', 'MB', 'KB']

    public String formatBytes(Double file_size, int precision) {
        file_size /= 1024 // start with KB
        int countdown = _FILE_SIZE_LABELS.size()
        while (countdown-- && (file_size > 1024) && countdown > 0) {
            file_size /= 1024
        }

        Double rounded = (precision > 0) ? file_size.round(precision) : file_size.round()
        String s = rounded + ' ' + _FILE_SIZE_LABELS[countdown]
        return s
    }

}